EP0928957A3 - Method and device for determination of colour value of transparent bodies - Google Patents

Method and device for determination of colour value of transparent bodies Download PDF

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Publication number
EP0928957A3
EP0928957A3 EP98811204A EP98811204A EP0928957A3 EP 0928957 A3 EP0928957 A3 EP 0928957A3 EP 98811204 A EP98811204 A EP 98811204A EP 98811204 A EP98811204 A EP 98811204A EP 0928957 A3 EP0928957 A3 EP 0928957A3
Authority
EP
European Patent Office
Prior art keywords
measurement object
image sensor
determination
colour value
transparent bodies
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98811204A
Other languages
German (de)
French (fr)
Other versions
EP0928957A2 (en
Inventor
Markus Berner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MHT Optic Res AG
MHT Optic Research AG
Original Assignee
MHT Optic Res AG
MHT Optic Research AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MHT Optic Res AG, MHT Optic Research AG filed Critical MHT Optic Res AG
Priority to US09/227,666 priority Critical patent/US6038024A/en
Publication of EP0928957A2 publication Critical patent/EP0928957A2/en
Publication of EP0928957A3 publication Critical patent/EP0928957A3/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C19/00—Dental auxiliary appliances
    • A61C19/10—Supports for artificial teeth for transport or for comparison of the colour
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • G01J3/0218—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using optical fibers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • G01J3/0224—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using polarising or depolarising elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/508—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors measuring the colour of teeth
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28—Investigating the spectrum
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/501—Colorimeters using spectrally-selective light sources, e.g. LEDs

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Spectrometry And Color Measurement (AREA)

Abstract

Um die Farbvalenz eines transluzenten Messobjekts (7), bestimmen zu können, wird vorgeschlagen, das Messobjekt (7) mit Licht (16) in unterschiedlichen Wellenlängenbereichen zu beleuchten oder das vom Messobjekt (7) reflektierte Licht (29) vor der Erfassung mit einem Bildsensor (23) in unterschiedliche Wellenlängenbereiche aufzuteilen. Um einen Sondenkopf (5) exakt an das Messobjekt (7) heranführen zu können, wird das Messobjekt (7) mittels eines weiteren Bildsensors (22) visualisiert. Vorzugsweise werden zwei Bildsensoren (22, 23) eingesetzt, wobei der eine Bildsensor (22) zum Visualisieren des Messobjekts (7) und der andere Bildsensor (23) zum Ermitteln der farbmetrischen Daten des Messobjekts (7) verwendet wird. Auf diese Weise kann die Farbvalenz des Messobjekts (7) sehr genau bestimmt werden. Zudem kann ein solches Verfahren mitsamt der zugehörigen Vorrichtung einfach realisiert werden.

Figure 00000001
In order to be able to determine the color valence of a translucent measurement object (7), it is proposed to illuminate the measurement object (7) with light (16) in different wavelength ranges or to illuminate the light (29) reflected by the measurement object (7) with an image sensor before detection (23) to be divided into different wavelength ranges. In order to be able to bring a probe head (5) exactly to the measurement object (7), the measurement object (7) is visualized by means of a further image sensor (22). Two image sensors (22, 23) are preferably used, one image sensor (22) for visualizing the measurement object (7) and the other image sensor (23) for determining the colorimetric data of the measurement object (7). In this way, the color valence of the measurement object (7) can be determined very precisely. In addition, such a method together with the associated device can be easily implemented.
Figure 00000001
EP98811204A 1998-01-09 1998-12-08 Method and device for determination of colour value of transparent bodies Withdrawn EP0928957A3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US09/227,666 US6038024A (en) 1998-01-09 1999-01-08 Method and an apparatus for determining the color stimulus specification of an object

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2798 1998-01-09
CH2798 1998-01-09

Publications (2)

Publication Number Publication Date
EP0928957A2 EP0928957A2 (en) 1999-07-14
EP0928957A3 true EP0928957A3 (en) 2002-08-21

Family

ID=4177715

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98811204A Withdrawn EP0928957A3 (en) 1998-01-09 1998-12-08 Method and device for determination of colour value of transparent bodies

Country Status (1)

Country Link
EP (1) EP0928957A3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6125223A (en) * 1998-08-31 2000-09-26 Oriel Corporation Spectrally resolved light
EP1477108A3 (en) * 1999-12-08 2014-06-11 X-Rite, Inc. Optical measurement device and related process
DE60021417T2 (en) * 1999-12-08 2006-05-24 X-Rite, Inc., Grandville Optical measuring device
DE10356729B4 (en) * 2003-12-02 2011-08-11 Deutsches Zentrum für Luft- und Raumfahrt e.V., 51147 color sensor
EP1621857A3 (en) 2004-07-29 2006-04-12 MHT Optic Research AG Device for the determination of the colour value of transparent objects, in particular teeth

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5432609A (en) * 1993-01-06 1995-07-11 Minolta Co., Ltd. Two-dimensional colorimeter
WO1996003833A1 (en) * 1994-07-27 1996-02-08 University Of Manchester Institute Of Science And Technology Producing or characterising colour images and measuring colour
WO1997024075A1 (en) * 1996-01-02 1997-07-10 Lj Laboratories, L.L.C. Apparatus and method for measuring optical characteristics of teeth

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5432609A (en) * 1993-01-06 1995-07-11 Minolta Co., Ltd. Two-dimensional colorimeter
WO1996003833A1 (en) * 1994-07-27 1996-02-08 University Of Manchester Institute Of Science And Technology Producing or characterising colour images and measuring colour
WO1997024075A1 (en) * 1996-01-02 1997-07-10 Lj Laboratories, L.L.C. Apparatus and method for measuring optical characteristics of teeth
US5759030A (en) * 1996-01-02 1998-06-02 Lj Laboratories, L.L.C. Method for determing optical characteristics of teeth

Also Published As

Publication number Publication date
EP0928957A2 (en) 1999-07-14

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